Longtime fears about the relationship between blood pressure-lowering medication and diabetes risk may be a thing of the past, one study suggested. Published in the medical journal Lancet, the study found that newer classes of blood pressure drugs are much less likely to affect glucose tolerance or trigger the onset of type 2 diabetes than older drugs. ACE inhibitor drugs and angiotensin-receptor blockers (ARBs) posed the lowest diabetes risk of all, while a somewhat higher risk was observed with beta blockers and diuretics. The study was conducted by researchers at Rush University Medical Center and based on data from 143,000 patients.